being a 2 stroke your bike will smoke a little regardless of how you ride, 32.1 is the standard ratio for the kdx & has been for years but there are some excellent modern 2 stroke oils on the market now..i like to run a mix of 40.1 in my 220 with the needle clip in number 2 position & mine still smokes! ..try running your clip 2nd notch from the top, make sure your air filter is nice & clean & also fit a new spark plug, try 40.1 mix ?... if your riding slower than normal & dont open the bike up then your bike will kinda `oil up` & spit spooge out the back :ride: , give the bike a good hard ride to clear it out :)